Package pro.taskana.task.api

Interface TaskService

All Known Implementing Classes:

TaskServiceImpl

public interface TaskService

The Task Service manages all operations on tasks.

Method Summary

Modifier and Type	Method	Description
Task	cancelClaim(String taskId)	Cancel the claim of an existing task if it was claimed by the current user before.
Task	cancelTask(String taskId)	Cancels a task.
Task	claim(String taskId)	Claim an existing task for the current user.
Task	completeTask(String taskId)	Complete a claimed Task as owner/admin and update State and Timestamps.
BulkOperationResults<String,TaskanaException>	completeTasks(List<String> taskIds)	Completes a list of tasks.
Task	createTask(Task taskToCreate)	Persists a not persisted Task which does not exist already.
TaskComment	createTaskComment(TaskComment taskComment)	Create a task comment.
TaskQuery	createTaskQuery()	This method provides a query builder for quering the database.
void	deleteTask(String taskId)	Deletes the task with the given Id.
void	deleteTaskComment(String taskCommentId)	Deletes the task comment with the given Id.
BulkOperationResults<String,TaskanaException>	deleteTasks(List<String> tasks)	Deletes a list of tasks.
Task	forceCancelClaim(String taskId)	Cancel the claim of an existing task even if it was claimed by another user.
Task	forceClaim(String taskId)	Claim an existing task for the current user even if it is already claimed by someone else.
Task	forceCompleteTask(String taskId)	Complete a Task and update State and Timestamps in every case if the Task exists.
BulkOperationResults<String,TaskanaException>	forceCompleteTasks(List<String> taskIds)	Completes a list of tasks.
void	forceDeleteTask(String taskId)	Deletes the task with the given Id even if it is not completed.
Task	getTask(String taskId)	Get the details of a task by Id without checking permissions.
TaskComment	getTaskComment(String taskCommentId)	Retrieves a task comment for a given taskCommentId.
List<TaskComment>	getTaskComments(String taskId)	Retrieves a list of task comments for a given taskId.
Attachment	newAttachment()	Returns a not persisted instance of Attachment.
Task	newTask()	Returns a not persisted instance of Task.
Task	newTask(String workbasketId)	Returns a not persisted instance of Task.
Task	newTask(String workbasketKey, String domain)	Returns a not persisted instance of Task.
TaskComment	newTaskComment(String taskId)	Returns a not persisted instance of TaskComment.
Task	selectAndClaim(TaskQuery taskQuery)	Selects and claims the first task which is returned by the task query.
BulkOperationResults<String,TaskanaException>	setCallbackStateForTasks(List<String> externalIds, CallbackState state)	Sets the callback state on a list of tasks.
BulkOperationResults<String,TaskanaException>	setOwnerOfTasks(String owner, List<String> taskIds)	Sets the owner on a list of tasks.
BulkOperationResults<String,TaskanaException>	setPlannedPropertyOfTasks(Instant planned, List<String> taskIds)	Sets the planned property on a list of tasks.
Task	setTaskRead(String taskId, boolean isRead)	Marks a task as read.
Task	terminateTask(String taskId)	Terminates a task.
Task	transfer(String taskId, String destinationWorkbasketId)	Transfer a task to another work basket.
Task	transfer(String taskId, String workbasketKey, String domain)	Transfer a task to another work basket.
BulkOperationResults<String,TaskanaException>	transferTasks(String destinationWorkbasketKey, String destinationWorkbasketDomain, List<String> taskIds)	Transfers a list of tasks to an other workbasket.
BulkOperationResults<String,TaskanaException>	transferTasks(String destinationWorkbasketId, List<String> taskIds)	Transfers a list of tasks to an other workbasket.
Task	updateTask(Task task)	Update a task.
TaskComment	updateTaskComment(TaskComment taskComment)	Update a task comment.
List<String>	updateTasks(List<String> taskIds, Map<TaskCustomField,String> customFieldsToUpdate)	Updates tasks with matching taskIds.
List<String>	updateTasks(ObjectReference selectionCriteria, Map<TaskCustomField,String> customFieldsToUpdate)	Updates tasks with a matching ObjectReference.

Method Detail

claim

Task claim(String taskId)
    throws TaskNotFoundException,
           InvalidStateException,
           InvalidOwnerException,
           NotAuthorizedException

Claim an existing task for the current user.

Parameters:

taskId - the id of the task to be claimed

Returns:

claimed Task

Throws:

TaskNotFoundException - if the task with taskId was not found

InvalidStateException - if the state of the task with taskId is not READY

InvalidOwnerException - if the task with taskId is claimed by some else

NotAuthorizedException - if the current user has no read permission for the workbasket the task is in

forceClaim

Task forceClaim(String taskId)
         throws TaskNotFoundException,
                InvalidStateException,
                InvalidOwnerException,
                NotAuthorizedException

Claim an existing task for the current user even if it is already claimed by someone else.

Parameters:

taskId - the id of the task to be claimed

Returns:

claimed Task

Throws:

TaskNotFoundException - if the task with taskId was not found

InvalidStateException - if the state of the task with taskId is not READY

InvalidOwnerException - if the task with taskId is claimed by someone else

NotAuthorizedException - if the current user has no read permission for the workbasket the task is in

cancelClaim

Task cancelClaim(String taskId)
          throws TaskNotFoundException,
                 InvalidStateException,
                 InvalidOwnerException,
                 NotAuthorizedException

Cancel the claim of an existing task if it was claimed by the current user before.

Parameters:

taskId - id of the task which should be unclaimed.

Returns:

updated unclaimed task

Throws:

TaskNotFoundException - if the task can´t be found or does not exist

InvalidStateException - when the task is already completed.

InvalidOwnerException - when the task is claimed by another user.

NotAuthorizedException - if the current user has no read permission for the workbasket the task is in

forceCancelClaim

Task forceCancelClaim(String taskId)
               throws TaskNotFoundException,
                      InvalidStateException,
                      InvalidOwnerException,
                      NotAuthorizedException

Cancel the claim of an existing task even if it was claimed by another user.

Parameters:

taskId - id of the task which should be unclaimed.

Returns:

updated unclaimed task

Throws:

TaskNotFoundException - if the task can´t be found or does not exist

InvalidStateException - when the task is already completed.

InvalidOwnerException - when forceCancel is false and the task is claimed by another user.

NotAuthorizedException - if the current user has no read permission for the workbasket the task is in

completeTask

Task completeTask(String taskId)
           throws TaskNotFoundException,
                  InvalidOwnerException,
                  InvalidStateException,
                  NotAuthorizedException

Complete a claimed Task as owner/admin and update State and Timestamps. If task is already completed, the task is returned as itself.

Parameters:

taskId - - Id of the Task which should be completed.

Returns:

Task - updated task after completion.

Throws:

InvalidStateException - when Task wasn´t claimed before.

TaskNotFoundException - if the given Task can´t be found in DB.

InvalidOwnerException - if current user is not the task-owner or administrator.

NotAuthorizedException - if the current user has no read permission for the workbasket the task is in

forceCompleteTask

Task forceCompleteTask(String taskId)
                throws TaskNotFoundException,
                       InvalidOwnerException,
                       InvalidStateException,
                       NotAuthorizedException

Complete a Task and update State and Timestamps in every case if the Task exists. If task is already completed, the task is returned as itself.

Parameters:

taskId - - Id of the Task which should be completed.

Returns:

Task - updated task after completion.

Throws:

InvalidStateException - when Task wasn´t claimed before.

TaskNotFoundException - if the given Task can´t be found in DB.

InvalidOwnerException - if current user is not the task-owner or administrator.

NotAuthorizedException - if the current user has no read permission for the workbasket the task is in

createTask

Task createTask(Task taskToCreate)
         throws NotAuthorizedException,
                WorkbasketNotFoundException,
                ClassificationNotFoundException,
                TaskAlreadyExistException,
                InvalidArgumentException

Persists a not persisted Task which does not exist already.

Parameters:

taskToCreate - the transient task object to be persisted

Returns:

the created and persisted task

Throws:

TaskAlreadyExistException - when the Task does already exist.

NotAuthorizedException - thrown if the current user is not authorized to create that task

WorkbasketNotFoundException - thrown if the work basket referenced by the task is not found

ClassificationNotFoundException - thrown if the Classification referenced by the task is not found

InvalidArgumentException - thrown if the primary ObjectReference is invalid

getTask

Task getTask(String taskId)
      throws TaskNotFoundException,
             NotAuthorizedException

Get the details of a task by Id without checking permissions.

Parameters:

taskId - the id of the task

Returns:

the Task

Throws:

TaskNotFoundException - thrown of the Task with taskId is not found

NotAuthorizedException - if the current user has no READ permission for the workbasket the task is in.

transfer

Task transfer(String taskId,
              String destinationWorkbasketId)
       throws TaskNotFoundException,
              WorkbasketNotFoundException,
              NotAuthorizedException,
              InvalidStateException

Transfer a task to another work basket. The transfer sets the transferred flag and resets the read flag.

Parameters:

taskId - The id of the Task to be transferred

destinationWorkbasketId - The Id of the target work basket

Returns:

the transferred task

Throws:

TaskNotFoundException - Thrown if the Task with taskId was not found.

WorkbasketNotFoundException - Thrown if the target work basket was not found.

NotAuthorizedException - Thrown if the current user is not authorized to transfer this Task to the target work basket

InvalidStateException - Thrown if the task is in a state which does not allow transferring

transfer

Task transfer(String taskId,
              String workbasketKey,
              String domain)
       throws TaskNotFoundException,
              WorkbasketNotFoundException,
              NotAuthorizedException,
              InvalidStateException

Transfer a task to another work basket. The transfer sets the transferred flag and resets the read flag.

Parameters:

taskId - The id of the Task to be transferred

workbasketKey - The key of the target work basket

domain - The domain of the target work basket

Returns:

the transferred task

Throws:

TaskNotFoundException - Thrown if the Task with taskId was not found.

WorkbasketNotFoundException - Thrown if the target work basket was not found.

NotAuthorizedException - Thrown if the current user is not authorized to transfer this Task to the target work basket

InvalidStateException - Thrown if the task is in a state which does not allow transferring

setTaskRead

Task setTaskRead(String taskId,
                 boolean isRead)
          throws TaskNotFoundException,
                 NotAuthorizedException

Marks a task as read.

Parameters:

taskId - the id of the task to be updated

isRead - the new status of the read flag.

Returns:

the updated Task

Throws:

TaskNotFoundException - Thrown if the Task with taskId was not found

NotAuthorizedException - if the current user has no read permission for the workbasket the task is in

createTaskQuery

TaskQuery createTaskQuery()

This method provides a query builder for quering the database.

Returns:

a TaskQuery

newTask

Task newTask()

Returns a not persisted instance of Task. The returned task has no workbasket Id set. When createTask() is invoked for this task, TaskService will call the TaskRouting SPI to determine a workbasket for the task. If the TaskRouting API is not active, e.g. because no TaskRouter is registered, or the TaskRouter(s) don't find a workbasket, the task will not be persisted.

Returns:

an empty new Task

newTask

Task newTask(String workbasketId)

Returns a not persisted instance of Task.

Parameters:

workbasketId - the id of the workbasket to which the task belongs

Returns:

an empty new Task

newTask

Task newTask(String workbasketKey,
             String domain)

Returns a not persisted instance of Task.

Parameters:

workbasketKey - the key of the workbasket to which the task belongs

domain - the domain of the workbasket to which the task belongs

Returns:

an empty new Task

newTaskComment

TaskComment newTaskComment(String taskId)

Returns a not persisted instance of TaskComment.

Parameters:

taskId - The id of the task to which the task comment belongs

Returns:

an empty new TaskComment

newAttachment

Attachment newAttachment()

Returns a not persisted instance of Attachment.

Returns:

an empty new Attachment

updateTask

Task updateTask(Task task)
         throws InvalidArgumentException,
                TaskNotFoundException,
                ConcurrencyException,
                ClassificationNotFoundException,
                NotAuthorizedException,
                AttachmentPersistenceException,
                InvalidStateException

Update a task.

Parameters:

task - the task to be updated in the database

Returns:

the updated task

Throws:

InvalidArgumentException - if the task to be updated contains invalid properties like e.g. invalid object references

TaskNotFoundException - if the id of the task is not found in the database

ConcurrencyException - if the task has already been updated by another user

ClassificationNotFoundException - if the updated task refers to a classification that cannot be found

NotAuthorizedException - if the current user is not authorized to update the task

AttachmentPersistenceException - if an Attachment with ID will be added multiple times without using the task-methods

InvalidStateException - if an attempt is made to change the owner of the task and the task is not in state READY .

transferTasks

BulkOperationResults<String,TaskanaException> transferTasks(String destinationWorkbasketId,
                                                                  List<String> taskIds)
                                                           throws NotAuthorizedException,
                                                                  InvalidArgumentException,
                                                                  WorkbasketNotFoundException

Transfers a list of tasks to an other workbasket. Exceptions will be thrown if the caller got no permissions on the target or it doesn´t exist. Other Exceptions will be stored and returned in the end.

Parameters:

destinationWorkbasketId - target workbasket id

taskIds - source task which will be moved

Returns:

Bulkresult with ID and Error in it for failed transactions.

Throws:

NotAuthorizedException - if the caller hasn´t permissions on tarket WB.

InvalidArgumentException - if the method paramesters are EMPTY or NULL.

WorkbasketNotFoundException - if the target WB can´t be found.

transferTasks

BulkOperationResults<String,TaskanaException> transferTasks(String destinationWorkbasketKey,
                                                                  String destinationWorkbasketDomain,
                                                                  List<String> taskIds)
                                                           throws NotAuthorizedException,
                                                                  InvalidArgumentException,
                                                                  WorkbasketNotFoundException

Transfers a list of tasks to an other workbasket. Exceptions will be thrown if the caller got no permissions on the target or it doesn´t exist. Other Exceptions will be stored and returned in the end.

Parameters:

destinationWorkbasketKey - target workbasket key

destinationWorkbasketDomain - target workbasket domain

taskIds - source task which will be moved

Returns:

Bulkresult with ID and Error in it for failed transactions.

Throws:

NotAuthorizedException - if the caller hasn´t permissions on tarket WB.

InvalidArgumentException - if the method paramesters are EMPTY or NULL.

WorkbasketNotFoundException - if the target WB can´t be found.

deleteTask

void deleteTask(String taskId)
         throws TaskNotFoundException,
                InvalidStateException,
                NotAuthorizedException

Deletes the task with the given Id.

Parameters:

taskId - The Id of the task to delete.

Throws:

TaskNotFoundException - If the given Id does not refer to an existing task.

InvalidStateException - If the state of the referenced task is not Completed.

NotAuthorizedException - if the current user is not member of role ADMIN

forceDeleteTask

void forceDeleteTask(String taskId)
              throws TaskNotFoundException,
                     InvalidStateException,
                     NotAuthorizedException

Deletes the task with the given Id even if it is not completed.

Parameters:

taskId - The Id of the task to delete.

Throws:

TaskNotFoundException - If the given Id does not refer to an existing task.

InvalidStateException - If the state of the referenced task is not Completed and forceDelet is false.

NotAuthorizedException - if the current user is not member of role ADMIN

selectAndClaim

Task selectAndClaim(TaskQuery taskQuery)
             throws NotAuthorizedException,
                    InvalidOwnerException

Selects and claims the first task which is returned by the task query.

Parameters:

taskQuery - the task query.

Returns:

the task that got selected and claimed

Throws:

InvalidOwnerException - if the task is claimed by someone else

NotAuthorizedException - if the current user has no read permission for the workbasket the task is in

deleteTasks

BulkOperationResults<String,TaskanaException> deleteTasks(List<String> tasks)
                                                         throws InvalidArgumentException,
                                                                NotAuthorizedException

Deletes a list of tasks.

Parameters:

tasks - the ids of the tasks to delete.

Returns:

the result of the operations with Id and Exception for each failed task deletion.

Throws:

InvalidArgumentException - if the TaskIds parameter is NULL

NotAuthorizedException - if the current user is not member of role ADMIN

completeTasks

BulkOperationResults<String,TaskanaException> completeTasks(List<String> taskIds)
                                                           throws InvalidArgumentException

Completes a list of tasks.

Parameters:

taskIds - of the tasks which should be completed.

Returns:

the result of the operations with Id and Exception for each failed task completion.

Throws:

InvalidArgumentException - If the taskId parameter is NULL.

forceCompleteTasks

BulkOperationResults<String,TaskanaException> forceCompleteTasks(List<String> taskIds)
                                                                throws InvalidArgumentException

Completes a list of tasks.

Parameters:

taskIds - of the tasks which should be completed.

Returns:

the result of the operations with Id and Exception for each failed task completion.

Throws:

InvalidArgumentException - If the taskId parameter is NULL.

See Also:

forceCompleteTask(java.lang.String)

updateTasks

List<String> updateTasks(ObjectReference selectionCriteria,
                         Map<TaskCustomField,String> customFieldsToUpdate)
                  throws InvalidArgumentException

Updates tasks with a matching ObjectReference.

Parameters:

selectionCriteria - the ObjectReference that is used to select the tasks.

customFieldsToUpdate - a Map that contains as key the identification of the custom field and as value the corresponding new value of that custom field.

Returns:

a list of the Ids of all modified tasks

Throws:

InvalidArgumentException - if the given selectionCriteria is invalid or the given customFieldsToUpdate are null or empty.

updateTasks

List<String> updateTasks(List<String> taskIds,
                         Map<TaskCustomField,String> customFieldsToUpdate)
                  throws InvalidArgumentException

Updates tasks with matching taskIds.

Parameters:

taskIds - the taskIds that are used to select the tasks.

customFieldsToUpdate - a Map that contains as key the identification of the custom field and as value the corresponding new value of that custom field.

Returns:

a list of the Ids of all modified tasks

Throws:

InvalidArgumentException - if the given customFieldsToUpdate are null or empty.

createTaskComment

TaskComment createTaskComment(TaskComment taskComment)
                       throws NotAuthorizedException,
                              TaskNotFoundException,
                              InvalidArgumentException

Create a task comment.

Parameters:

taskComment - the task comment to be created.

Returns:

the created task comment.

Throws:

NotAuthorizedException - If the current user has no authorization to create a task comment for the given taskId in the TaskComment or is not authorized to access the task.

TaskNotFoundException - If the given taskId in the TaskComment does not refer to an existing task.

InvalidArgumentException - If the given taskCommentId from the provided task comment is not null or empty

updateTaskComment

TaskComment updateTaskComment(TaskComment taskComment)
                       throws NotAuthorizedException,
                              ConcurrencyException,
                              TaskCommentNotFoundException,
                              TaskNotFoundException,
                              InvalidArgumentException

Update a task comment.

Parameters:

taskComment - the task comment to be updated in the database.

Returns:

the updated task comment.

Throws:

NotAuthorizedException - If the current user has no authorization to update a task comment or is not authorized to access the task.

ConcurrencyException - if an attempt is made to update the task comment and another user. updated it already.

TaskCommentNotFoundException - If the given taskCommentId in the TaskComment does not refer to an existing taskComment.

TaskNotFoundException - If the given taskId in the TaskComment does not refer to an existing task.

InvalidArgumentException - If the given taskCommentId from the provided task comment is null or empty

deleteTaskComment

void deleteTaskComment(String taskCommentId)
                throws NotAuthorizedException,
                       TaskCommentNotFoundException,
                       TaskNotFoundException,
                       InvalidArgumentException

Deletes the task comment with the given Id.

Parameters:

taskCommentId - The id of the task comment to delete.

Throws:

NotAuthorizedException - If the current user has no authorization to delete a task comment or is not authorized to access the task.

InvalidArgumentException - If the taskCommentId is null/empty

TaskCommentNotFoundException - If the given taskCommentId in the TaskComment does not refer to an existing taskComment.

TaskNotFoundException - If the given taskId in the TaskComment does not refer to an existing task.

InvalidArgumentException - If the given taskCommentId is null or empty

getTaskComment

TaskComment getTaskComment(String taskCommentId)
                    throws TaskCommentNotFoundException,
                           NotAuthorizedException,
                           TaskNotFoundException,
                           InvalidArgumentException

Retrieves a task comment for a given taskCommentId.

Parameters:

taskCommentId - The id of the task comment which should be retrieved

Returns:

the task comment identified by taskCommentId

Throws:

TaskCommentNotFoundException - If the given taskCommentId in the TaskComment does not refer to an existing taskComment.

NotAuthorizedException - If the current user has no authorization to retrieve a taskComment from a certain task or is not authorized to access the task.

TaskNotFoundException - If the given taskId in the TaskComment does not refer to an existing task.

InvalidArgumentException - If the given taskCommentId is null or empty

getTaskComments

List<TaskComment> getTaskComments(String taskId)
                           throws NotAuthorizedException,
                                  TaskNotFoundException

Retrieves a list of task comments for a given taskId.

Parameters:

taskId - The id of the task for which all task comments should be retrieved

Returns:

the list of task comments attached to task with id taskId

Throws:

NotAuthorizedException - If the current user has no authorization to retrieve a taskComment from a certain task or is not authorized to access the task.

TaskNotFoundException - If the given taskId in the TaskComment does not refer to an existing task.

setCallbackStateForTasks

BulkOperationResults<String,TaskanaException> setCallbackStateForTasks(List<String> externalIds,
                                                                             CallbackState state)

Sets the callback state on a list of tasks. Note: this method is primarily intended to be used by the TaskanaAdapter

Parameters:

externalIds - the EXTERNAL_IDs of the tasks on which the callback state is set.

state - the callback state that is to be set on the tasks

Returns:

the result of the operations with Id and Exception for each failed task deletion.

setOwnerOfTasks

BulkOperationResults<String,TaskanaException> setOwnerOfTasks(String owner,
                                                                    List<String> taskIds)

Sets the owner on a list of tasks. The owner will only be set on tasks that are in state READY.

Parameters:

owner - the new owner of the tasks

taskIds - the IDs of the tasks on which the owner is to be set.

Returns:

the result of the operations with Id and Exception for each failed task update.

setPlannedPropertyOfTasks

BulkOperationResults<String,TaskanaException> setPlannedPropertyOfTasks(Instant planned,
                                                                              List<String> taskIds)

Sets the planned property on a list of tasks. Only tasks in state READY and CLAIMED will be affected by this method. On each task, the corresponding due date is set according to the shortest service level in the classifications of the task and the task's attachments.

Parameters:

planned - the new 'PLANNED" property of the tasks

taskIds - the IDs of the tasks on which the new planned property is to be set.

Returns:

the result of the operations with Id and Exception for each failed task update.

cancelTask

Task cancelTask(String taskId)
         throws TaskNotFoundException,
                InvalidStateException,
                NotAuthorizedException

Cancels a task. Cancellation means a task is obsolete from a business perspective an does not need to be completed anymore.

Parameters:

taskId - the id of the task to cancel.

Returns:

the updated task.

Throws:

TaskNotFoundException - if the Task with Id TaskId is not found

InvalidStateException - if the task is not in state READY or CLAIMED

NotAuthorizedException - if the current user is not authorized to see the task

terminateTask

Task terminateTask(String taskId)
            throws TaskNotFoundException,
                   InvalidStateException,
                   NotAuthorizedException

Terminates a task. Termination is a administrative action to complete a task. This is typically done by an administration to correct any technical issue.

Parameters:

taskId - the id of the task to cancel.

Returns:

the updated task.

Throws:

TaskNotFoundException - if the Task with Id TaskId is not found

InvalidStateException - if the task is not in state READY or CLAIMED

NotAuthorizedException - if the current user is not authorized to see the task